I made the decision to nab a decent flash for my T2i to help with some of the low-light issues that crop bodies have. I'd love to upload some sample pictures, but that will have to wait; I'm finally dumping over a months worth of RAWs onto my computer now.

All I can say about using a decent flash is that it's a LOT different from shooting without a flash (which is how I've shot 90% of my photos; the built in flash is much too harsh). I have to get the hang of it and it might make me look a little ridiculous (my camera no longer looks like a T2i with the battery grip and flash on it), but I'm going to keep at it until I get some usable results!